This is a one-gou masu (square wooden cup) made of Japanese cypress. It's a used item that I've kept at home for a long time, but it has never been used. Please be aware that it has been stored for quite a while, so there are fine scratches, scuffs, and stains. There are noticeable spots like stains on the bottom (see photo), which is a sign of aging. The inner dimensions are 6.1cm square, and the depth is 4.7cm. Calculating the volume based on these dimensions, it comes out to 175mL. Please note that this one-gou masu is slightly short of the standard 180mL for one gou. It will be shipped in a Yu-Packet Plus box.